<template>
  <div class="app-container">
      添加讲师
      <el-form label-width="120px">
        <el-form-item label="讲师名称">
          <el-input v-model="teacher.name"/>
        </el-form-item>
        <el-form-item label="讲师排序">
          <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
        </el-form-item>
        <el-form-item label="讲师头衔">
          <el-select v-model="teacher.level" clearable placeholder="请选择">
            <!--
              数据类型一定要和取出的json中的一致，否则没法回填
              因此，这里value使用动态绑定的值，保证其数据类型是number
            -->
            <el-option :value="1" label="高级讲师"/>
            <el-option :value="2" label="首席讲师"/>
          </el-select>
        </el-form-item>
        <el-form-item label="讲师资历">
          <el-input v-model="teacher.career"/>
        </el-form-item>
        <el-form-item label="讲师简介">
          <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
        </el-form-item>

        <!-- 讲师头像：TODO -->
        <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
            <image-cropper
                          v-show="imagecropperShow"
                          :width="300"
                          :height="300"
                          :key="imagecropperKey"
                          :url="BASE_API+'/eduoss/fileoss'"
                          field="file"
                          @close="close"
                          @crop-upload-success="cropSuccess"/>

        </el-form-item>

        <el-form-item>
          <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
        </el-form-item>
      </el-form>
   </div>
</template>
<script>
import teacherAPI from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
   components: { ImageCropper, PanThumb },
   data() {
    return {
      teacher: {
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: ''
      },
      imagecropperShow:false,// 是否显示上传组件
      imagecropperKey:0,// 上传组件id
      BASE_API:process.env.BASE_API, // 接口API地址
      //saveBtnDisabled: false // 保存按钮是否禁用,
    }
  },
  watch: {
    $route(to, from) {
      console.log('watch $route')
      this.init()
    }
  },
  created() {
    this.init()
  },
  methods:  {
    close() {
        this.imagecropperShow=false
        this.imagecropperKey = this.imagecropperKey+1
    },
    cropSuccess(data) {
      this.imagecropperShow=false
      //上传完返回图片地址
        this.teacher.avatar = data.url
        
        this.imagecropperKey = this.imagecropperKey+1
    },
    getInfo(id) {
      teacherAPI. getTeacherInfo(id)
      .then(response => {
        this.teacher = response.data.teacher
      })
    },
    saveTeacher() {
        teacherAPI.addTeacher(this.teacher)
          .then(response => {
            this.$message({
                  type: 'success',
                  message: '添加成功!'
              })  
              this.$router.push({path:'/teacher/table'})
          })
      },
      saveOrUpdate() {
          if(!this.teacher.id){
            this.saveTeacher()
          }else{
            this.updateTeacherInfo()
          }
      },
      updateTeacherInfo(teacher){
        teacherAPI.updateTeacher(this.teacher)
        .then(response => {
            this.$message({
                  type: 'success',
                  message: '修改成功!'
              })  
              this.$router.push({path:'/teacher/table'})
        })
      },init() {
          if (this.$route.params && this.$route.params.id) {
            const id = this.$route.params.id
            this.getInfo(id)(id)
          } else {
            // 使用对象拓展运算符，拷贝对象，而不是引用，
            // 否则新增一条记录后，defaultForm就变成了之前新增的teacher的值
            this.teacher = {}
          }
      }
  }

}

</script>